Lions General Manager Martin Mayhew says defensive tackle Nick Fairley, the team’s 2011 first-round draft pick, has to get better. However, Mayhew did say Fairley has to mature to become the consistent force he expected when he drafted Fairley in the firs… (more)t round out of Auburn in 2011. That was a loaded draft, and when you consider that Mayhew selected Fairley one pick before the Rams selected All-Pro defensive end Robert Quinn, you realize why Mayhew may have some buyer’s remorse on Fairley. He could play more consistently, Mayhew said Monday after the first Senior Bowl practice. General manager Martin Mayhew said the Lions have not yet determined whether theyll pick up the fifth-year option on defensive tackle Nick Fairleys rookie contract, which would keep him in Detroit through 2015. Fairley finished the 2013 season with 35 tackles, three for loss, six sacks, two forces fumbles, two fumble recoveries and a safety, and he played in 15 games, the most of his three seasons as hes dealt with multiple injuries. Though the Lions finished sixth in rushing defense in 2013, they had just 33 sacks, ranking 28th in the league.